stock



Nov. 29 1927.

J. E. STUCK REVERSIBLE ,FAN FOR COOLING SYSTEMS Filed July 6, 1925 u 0 M 2 0 M a or II?) Patented Nov. 29, 192 7.

JOHN E. streamer nnrnorrfiarcniean.

REVERSIBLE FAN FOR COOLING SYSJTEMS- Application filed July 6,

This invention relates to cooling tans wherein the blades are adjustable as to in clination so that they may beset with their pitch. directed forwardly or rearwardly ,ot the plane of rotation of the fan, whereby the said fan maybe caused. to direct air forwardly or rearwardly thereof as required or may be so set in a neutral position in which but little air displacement takes place. Eiuch a device is described in my pending applica tion, Serial No. 721,725, tiled June 523, 1924;, and this invention has tor its object to provide an improved method of controlling or setting the inclination of the tan bladesin order that adjustments thereof may be easily and readily effected in a simple and efliclent manner;

A further object is to provide for the adjustment of theblades through the medium of a memberextending axially of the tan shaft whereby very positive and easy actuated adjustable means is rendered possible without complexity of moving parts. I

Still further objects subsidiary to or resulting from the aforesaid objects or from the construction or operation of the inven tion as it may be carried into ell'cct, will become apparent as the said invention ishereinat'ter further disclosed. I

In carrying the said invention into effect, I may mount the blades of the fan in a hub within which is arranged a movable mem-- ber adapted by its movement to effect the adjustment of the extent and direction of the angular disposition of the fan blades, a shaft upon which the said hub is mounted and which is in turn mounted in a suitable support, and an actuator extending through said shaft and connected. with said movable means for the operation thereof, said actuator being adapted when rotated to impart reciprocal movement to said movable member; and means for remotely controlling the rotation of said actuator.

All of which is more particularly described and ascertained hereinafter, by way of example, having reference to the accompanying drawings, wherein Figure l is a vertical section of a fan device embodying the saidinvention, show 1925. Serial No; 41,616.

ing the same as being mounted on a suitable support, the parts of the said device being indicated in fragmentary form; ,Figure 2 is a fragmentary end elevation'ot the tan with the end plate removed therefrom; v

Figure 3 is a detail perspective view with the blade shifting block removed; and.

Figure 4- is a fragmentary detail perspective view of the inner end of one out the blade spindles. i

Similar characters of reference indicate similaparts in the several figures of the drawing. t

1 indicates an engine provided with a fan support 2, carrying an arm 3 in which is mounted a tan spindle-4t. Rotatably-mounted upon the said fan spindle leis a tan pulley 5 to which is secured by means of bolts 6a hollow lt'an hub 7 having an approximately rectangular bore and closed at its outer end by a plate 8, the spindles9 0t ATENT oFF cs;

the fan blades 10 being radially journaled in the walls of the said hub7.

The said spindles are provided at their" ends within the said hub with disks ll 'shouldering against the inner walls ot the said hub and provided on their lnner tacos disks 11 are located. This block 14 is reciprocable between the said disks lengthwise of the hub so that such reciprocable movement of the said block will result in the turning of the said disks and incidentally the fan blades in one or other direction, so that the extent and direction of such inclination of the said blades may be varied by movement of the said block 14.

It is desirable that the said block may be actuated preferably from a pointsubstaa tially remote fromthe said fan to ettect such adjustment of the tan blades and that the method of such actuation should be such that it may be positively efiected and adapted to be easily secured in any position of adjustment; and for such purposes of actuation of the said blocklt, I indicate the fan spindle 4 as being tubular and also havsecured at its outer end by the nut 17 to the said'blockl l. The inner end of the said rod 16 which pIOJQCtS ttroin the inner end of the spindle 4 is provided with a sprocket '18 over which passes a chain 19 engaginga further sprocket 20 carriedby a rod 21 which may extend to any suitable point of opera tion, and which Wlll upon rotation result in the rotation of the said rod 16 by reason 7 of its being geared thereto in. the manner described.

f Mounted upon therodltl and Within the enlarged bore 15 .ofthe spindle 4c is a drum 22 having a spiral groove 23 therein and the said spindle fl is provided with pin 24, the inner end of which enters the said groove 23 whereby the said drum is caused to reciprocate Within the spindle when the said drum is rotated with the rod 16 by the rotation of the rod 21, and as the block 1% is secured'to theend of the said rod 16 and the said rod reciprocates With the said drum 22, this motion is transmitted to the said block and the rotation of .the fan .blades in one or other direction results. Consequently, the adjustment of the fan blades may 'be effected simply by the rotation of the rod 21 in one or other direction, and ;.to such extent as may be desired, and any means may be provided for retaining the jparts in their adjusted position, such, for example, as .by

the said rod 21 being frictionally engaged by its support or hearing 25 to an extent resisting movement otthe said rod other than when deliberately eiiected.

It will be seen that the construction admits ofthe use of ball bearings 25 in the block 14, and ball'bearings27 and 28 in the pulley 5 so that a very easy running device maybe secured, and it Will also be apparent that the interior of the pulley and the hub may packed with grease or. other suitable lubricant to further increase the free running propertiesof the said device.

This invention may be developed within the scope of the following cla1m Without departing from the essential ,ieatu'resoz the said invention, and it is desired that the.

' groove, a pin carried by said spindle and extending nto said groove, and ineans'iior turning said rod,

In testimony whereof I affix my signature.

JOHN E. STOCK. 

